7 1/4" LMS Jinty

[ianmcgoo22]

Hi everyone,

I have recently started building an LMS 3F Jinty in 7 ¼” gauge, using a set of drawings I got from the 7 ¼” Gauge Society. Does anyone here know anything about the history of these drawings, or if there are any issues with them?   The drawings are done by hand and have a date of 1992 on them, plus a signature I can’t read. If anyone knows anything, I’d love to hear it. I would also love to know if anyone has ever done any castings for a Jinty in this size, especially wheels.

Thanks a lot!
Ian

[smallbrother]

Hi Ian,

Can't help with any of that but what a fantastic project. Keep us informed of progress please!

Pete.

[ianmcgoo22]

Thanks Pete!  Once I get the main frames and a couple of other parts made I'll take some pictures and maybe start a build thread.

Cheers!  Ian

[jordanleeds]

Oct 3, 2019 16:39:03 GMT ianmcgoo22 said:

Hi everyone,

I have recently started building an LMS 3F Jinty in 7 ¼” gauge, using a set of drawings I got from the 7 ¼” Gauge Society. Does anyone here know anything about the history of these drawings, or if there are any issues with them?   The drawings are done by hand and have a date of 1992 on them, plus a signature I can’t read. If anyone knows anything, I’d love to hear it. I would also love to know if anyone has ever done any castings for a Jinty in this size, especially wheels.

Thanks a lot!
Ian

Hi ian, the drawings you have are by Richard Gomersal and they in turn where distributed by pp mackindale and then Chris finken over here along with castings I have only ever seen one completed loco which a friend owned

[ianmcgoo22]

Hi Jordan, thank you for the information! At least I know a little bit more now, although (as I'm sure you probably know,) none of the names you mention seem to be around anymore.
I notice you mention there were castings done. Do you think there would be any chance there are any still available?

Cheers,
Ian

[don9f]

Hi Ian, sorry for the delay but here are some photos of the rear buffer beam of 3F 47564 which is slowly rusting away in open storage at Butterley.

There are two different sizes of rivet heads, larger being approx. 1 3/8“ dia. and smaller approx. 1 1/4” dia.
There is so much rust, they have probably wasted away somewhat since it was built!

Hope they are of some use.

Cheers Don

[ianmcgoo22]

Thank you very much for these, Don. They're exactly what I was looking for!

Cheers, Ian

[dscott]

What a wonderful project Ian.
A very nice size and like the Jessie I have just started very portable... Yes got to help load a 9F in 7 1/4 last year!!!!
Nice amount of power though when it had us thrust backwards on acceleration? Yes the last day of a Garden Railway!!

I ended up making a new front bufferbeam on our 5 inch gauge version, also putting in all of these on the existing rear one.
Well worth it.
Several of us on here have loads of photos we can share.

Best regards.
David and Lily. Reading England.

[don9f]

In response to a request from Ian and for the interest of others, here are some details of the full size axlebox hornguide arrangements, taken from 47564.

First thing of note is that the front & rear guides of each axlebox are separate....unlike those drawn for the Martin Evans 5 inch version which uses "conventional" inverted 'U' types. This photo shows the leading RH guides, the front one of which is right up against the cylinder block....note the five "fitted" (presumed) bolts for each guide:- 




I'm not sure what the studs above the axlebox were for, but probably to do with the lubrication. There were normally three pipes per axlebox, one for the bearing and one for each guide face.

Next is the trailing LH position....same arrangement:-



Now the middle, or driving LH axlebox on the crank axle. This time the guides are slightly different and have seven bolts for each guide:-



Looking between the spokes, the heads of the bolts are possibly countersunk into the frames and hammered in, but not sure about this. These particular loco frames are from 3F 47564, owned by Derby City Council and I don't think there is any plan to do anything with them. Apart from the obvious deterioration, they are basically in the condition they were in when the loco was withdrawn after being used as a stationary boiler in the 1960's:-



Cheers   Don

[ianmcgoo22]

Hello Don, thank you so much for taking these pics. They're perfect, exactly what I was looking for.


Best wishes, Ian

[don9f]

Glad to help....I’m usually there on Sundays, so let me know if there’s anything else I can take photos of (imminent knee replacement permitting).

Cheers Don